https://git.ruby-lang.org/ruby.git/commit/?id=2c02d5714e

From 2c02d5714e401159f0221d3c2d461bc79db61e3a Mon Sep 17 00:00:00 2001
From: Benoit Daloze <eregontp@g...>
Date: Thu, 27 Jun 2019 11:57:23 +0200
Subject: Add a comment explaining what to do if specs fail on Ruby 2.4


diff --git a/.travis.yml b/.travis.yml
index cd681ed..75759e5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -314,6 +314,8 @@ env: https://github.com/ruby/ruby/blob/trunk/.travis.yml#L314
     before_script: chmod -R u+w spec/ruby
     # -j randomly hangs.
     script: ruby -C spec/ruby ../mspec/bin/mspec .
+    after_failure:
+      - echo "ruby/spec failed on Ruby 2.4. This is likely because of a missing ruby_version_is guard, please add it. See spec/README.md."
 
   - &baseruby
     name: "BASERUBY: Ruby 1.9.3"
-- 
cgit v0.10.2


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